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Surface treatment of Mixed-Halide CsPb(BrxI1-x)3 perovskite quantum dots for thermal stability enhancement
- Huynh, K.A.;
- Nguyen, T.V.;
- Bae, S.-R.;
- Do, H.H.;
- Heo, D.Y.;
- ... Ahn, Sang Hyun;
- 외 3명
WEB OF SCIENCE
10SCOPUS
10초록
In this study, the thermal stability of mixed-halide CsPb(BrxI1-x)3 perovskite quantum dots was investigated by monitoring its absorption, photoluminescence spectra, and X-ray diffraction. CsPb(Br0.8I0.2)3 was found to be the most stable composition at a constant temperature of 100 °C for up to 96 h, although some agglomeration was observed. In contrast, CsPb(Br0.2I0.8)3 revealed the most unstable composition under the same conditions as the aggregated iodide-rich domain easily transformed into the yellow-colored, non-luminescent δ-phase. CsPb(Br0.5I0.5)3 also showed phase segregation, where its original phase separated into bromide-rich and iodide-rich domains. By passivating the surface of mixed-halide perovskite, the particle agglomeration of CsPb(Br0.8I0.2)3 and phase segregation of CsPb(Br0.5I0.5)3 were significantly suppressed; however, the prevention of CsPb(Br0.2I0.8)3 phase transformation was less successful. © 2021 Elsevier Ltd
키워드
- 제목
- Surface treatment of Mixed-Halide CsPb(BrxI1-x)3 perovskite quantum dots for thermal stability enhancement
- 저자
- Huynh, K.A.; Nguyen, T.V.; Bae, S.-R.; Do, H.H.; Heo, D.Y.; Le, Q.V.; Jang, H.W.; Ahn, Sang Hyun; Kim, S.Y.
- 발행일
- 2022-02
- 유형
- Article
- 권
- 146
- 언어
- ENG
- 출판사
- Elsevier Ltd
- 발행국가
- 영국
- ISSN
- E 1873-4227
P 0025-5408